11506521 has 8 divisors (see below), whose sum is σ = 16522240. Its totient is φ = 7080912.

The previous prime is 11506511. The next prime is 11506531. The reversal of 11506521 is 12560511.

It is an interprime number because it is at equal distance from previous prime (11506511) and next prime (11506531).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11506521 - 2⁵ = 11506489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11506511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 147481 + ... + 147558.

It is an arithmetic number, because the mean of its divisors is an integer number (2065280).

Almost surely, 2^11506521 is an apocalyptic number.

It is an amenable number.

11506521 is a deficient number, since it is larger than the sum of its proper divisors (5015719).

11506521 is a wasteful number, since it uses less digits than its factorization.

11506521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295055.

The product of its (nonzero) digits is 300, while the sum is 21.

The square root of 11506521 is about 3392.1263242987. The cubic root of 11506521 is about 225.7605276612.

The spelling of 11506521 in words is "eleven million, five hundred six thousand, five hundred twenty-one".